User terminal and radio communication method

Patent metadata

Field	Value
Publication number	US-11399292-B2
Application number	US-201716621619-A
Country	US
Kind code	B2
Filing date	Jun 12, 2017
Priority date	Jun 12, 2017
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

According to one aspect of the present invention, a user terminal has a transmission section that transmits a signal in a plurality of CGs, including a first cell group (CG) and a second CG corresponding to a longer slot length than the first CG, and a control section that controls transmission power in each CG, and the control section switches a transmission power control policy in a certain slot based on whether or not the certain slot of the first CG overlaps with a slot boundary of the second CG. According to one aspect of the present invention, even when multiple numerologies are supported in a given carrier, it is possible to reduce the decline in communication throughput and so forth.

First claim

The invention claimed is:

1. A terminal comprising:
a transmitter that transmits a signal in a first cell group (CG) and a second CG; and
a processor that controls to limit a transmission power in the second CG to a first power, when it is notified, by using higher layer signaling, that switching of transmission power control is enabled and a transmission period in the first CG overlaps with a transmission period in the second CG,
wherein the processor controls to not limit the transmission power in the second CG to the first power when it is notified, by using higher layer signaling, that switching of transmission power control is disabled.

2. The terminal according to claim 1 , wherein when the transmitter does not perform a transmission in the first CG, the processor controls to limit a transmission power in the second CG to a second power which is equal to or larger than the first power.

3. A radio communication method for a terminal, comprising:
transmitting a signal in a first cell group (CG) and a second CG; and
controlling to limit a transmission power in the second CG to a first power, when it is notified, by using higher layer signaling, that switching of transmission power control is enabled and a transmission period in the first CG overlaps with a transmission period in the second CG; and
controlling to not limit the transmission power in the second CG to the first power when it is notified, by using higher layer signaling, that switching of transmission power control is disabled.

4. A system comprising a terminal and a base station, wherein
the terminal comprises:
a transmitter that transmits a signal in a first cell group (CG) and a second CG; and
a processor that controls to limit a transmission power in the second CG to a first power, when it is notified, by using higher layer signaling, that switching of transmission power control is enabled and a transmission period in the first CG overlaps with a transmission period in the second CG,
wherein the processor controls to not limit the transmission power in the second CG to the first power when it is notified, by using higher layer signaling, that switching of transmission power control is disabled, and

the base station comprises:
a receiver that receives the signal.

Assignees

• Ntt Docomo Inc

Inventors

• Osawa Ryosuke

Classifications

• H04W52/241

  taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo · CPC title

• H04W84/045

  using private Base Stations, e.g. femto Base Stations, home Node B · CPC title

• H04W52/245

  taking into account received signal strength · CPC title

• H04W52/346

  distributing total power among users or channels · CPC title

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title